Model 526T Series II Super Punch
Microphone User Guide
TRANSISTORIZED BASE STATION MICROPHONE
S Replaces either ceramic or dynamic original equip-
ment microphones
S Excellent response for single-sideband transmission
S Uses readily available 9-volt battery—low current
drain for long life
S Low hum pickup, minimum susceptibility to RF inter-
ference
S Momentary or locking press-to-talk transmit/receive
switch –”Million Cycle” leaf-type
S Universal six-wire cable for instant microphone-trans-
ceiver connection
S Sturdy, high-impact ARMO-DUR case
S Rugged and dependable under all operating
conditions
BATTERY INSTALLATION
GENERAL
The Shure Model 526T Series II SUPER PUNCH base
station microphone is designed for clearer transmission and
improved reliability. This transistorized microphone can be
used to replace ceramic or dynamic, high- or low-impedance
microphones supplied as original equipment.
Model 526T Series II uses a 9 Vdc battery (90AJ1371).To
install the battery, proceed as follows:
1. Loosen two screws (located underneath base) holding
battery retaining clip, and remove battery retaining
clip.
Model 526T Series II provides crisp, undistorted voice re-
sponse with adjustable volume control for optimum intelligi-
bility of transmission.
2. Connect terminal strap to battery.
3. Insert battery in VELCRO strap of battery retaining
cllip and fasten VELCRO strap.
The microphone is designed for maximum versatility in
base station operation. It has a momentary or locking press-
to-talk transmit/receive switch for greatest ease of use, and
a modulation level volume control for highest undistorted
output with high- or low-impedance inputs. The supplied six-
wire cable and triple-pole double-throw switch are arranged
for universal microphone-transceiver connection.
4. Insert battery retaining clip in base and tighten screws
securely.
CONNECTIONS
The microphone is not affected by heat or humidity, and it
is oustanding in its ability to resist mechanical shocks and
vibration. Its exclusive ARMO-DUR case is immune to oil,
grease, fumes, salt spray, sun, rust, and corrosion. The “Mil-
lion Cycle” leaf-type press-to-talk switch is designed to with-
stand rigorous operating conditions and constant use.
Model 527T Series II can be connected to an input (trans-
ceiver, transmitter, or amplifier) of 500 ohms or more. For de-
tailed instructions for connecting the 526T Series II to CB or
ham transceivers. If your unit is not listed in the Guide, con-
tact your dealer or Shure Incorporated for information.
A piece of tubing is attached to the plug end of the cable
for use as a strain relief for plugs with large cable entry holes.
Remove the tubing when not required.
Microphone Features:
S Dynamic microphone with transistorized preamplifier
S Adjustable volume control for optimum transmiter
The internal connections of Model 526T Series II are as
shown in Figure 1.
modulation and maximum intelligibility
2001, Shure Incorporated
27B1468 (AI)
Printed in Mexico
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Polar Pattern
Omnidirectional
a) Unsolder the WHITE leads from switch terminals 7
and 8.
Output Impedance
5,000 ohms
b) Solder the WHITE leads together, and insulate the
connection.
c) Unsolder the RED cable lead from terminal 3 and
solder it to terminal 8.
Load Impedance
500 ohms minimum
d) Solder a jumper lead between terminal 7 and the
ground lug.
Output Level (At 1,000 Hz with 100 kilohm load)
Adjustable from 0.61 to 16 mV for 1 microbar input
At the end of the cable, BLACK and BLUE leads are now
the isolated receive leads; the YELLOW lead is the
grounded receive lead; and the RED lead is the grounded
transmit lead.
Signal Handling Capability (With 50 kilohm load)
111 dB SPL at 1,000 Hz produces 1.0V with volume con-
trol at maximum
Battery Type
VOLUME CONTROL
9 Vdc
When the 526T Series II replaces a dynamic (usually low–
impedance) microphone supplied as original equipment, the
volume control should be set at the lower ranges to prevent
overmodulation and unintelligible transmission. Correct
modulation can be checked on the modulation level indicator.
Battery Drain
0.9 mA
Battery Life
300 hours minimum, replace after 1 year
When the 526T Series II replaces a ceramic (usually high-
impedance) microphone supplied as original equipment, the
volume control should be set at the upper ranges for correct
modulation as indicated on the modulation level indicator.
Switches
Press-to-talk: Single-bar, momentary or locking, leaf-type
triple-pole, double-switch
Cable
2.1m (7 ft) five conductor, one-conductor shielded, rubber
jacketed, attached, coiled cable
WARNING
Too high a volume control setting causes over-
modulation, interference, channel splatter, and
unintelligible voice transmission. Carefully check
the volume control setting.
Case
Black, high-impact ARMO-DUR
Dimensions
See Figure 3
LOCKING PRESS-TO-TALK SWITCH
The fingertip control bar of the press-to-talk switch can be
used in a momentary or locked-on position. For use as a mo-
mentary switch, depress the control bar and release after
transmission. To lock the switch in the On position, depress
the control bar and move it forward with the fingertips. To un-
lock the switch, move the control bar backward and remove
pressure.
Net Weight
920 grams (2 lb)
Packaged Weight
1.2 kilograms (2 lb. 11 oz)
3
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Replacement Parts
Cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . R96
Grille Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 90D1844
Battery Retaining Clip . . . . . . . . . . . . . . . . . . . . . 90A2351
Baseplate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53A1459A
Coiled Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70A544
Switch Blade Assembly (6-blade) . . . . . . . . . . . 90A2595
Switch Blade Assembly (4-blade) . . . . . . . . . . . 90A3510
Press-to-talk Control Bar . . . . . . . . . . . . . . . . . 65A1279A
Volume Control . . . . . . . . . . . . . . . . . . . . . . . . . . . 46A060
Printed Circuit Assembly . . . . . . . . . . . . . . . . . . 90A2721
222 Hartrey Avenue, Evanston, IL 60202–3696, U.S.A.
Phone: 847-866–2200 Fax: 847-866-2279
In Europe, Phone: 49-7131-72140 Fax: 49-7131-721414
In Asia, Phone: 852-2893-4290 Fax: 852-2893-4055
Elsewhere, Phone: 847-866–2200 Fax: 847-866-2585
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